Source : Webster's Revised Unabridged Dictionary (1913)

Campestral \Cam*pes"tral\, Campestrian \Cam*pes"tri*an\, a. [L.
   campester, fr. campus field.]
   Relating to an open fields; drowing in a field; growing in a
   field, or open ground.

Source : WordNet®

campestral
     adj : of fields or open country; "living in campestral seclusion"